Construction of sheet-metal doors.



MAURICE LACHMAN,

CONSTRUCTION OF SHEET-METAL DGORS.

Specification of Letters latent.

OF NEW' YORK, N. Y.

Application led May 6, 1913. Serial No. 765,773.

.T 0 all whom it may concern Be it known that I, MAURICE LACHMAN, a citizen of the United States, and a resident of New York, in the county of-Nexv York and State of New York, have invented certain nenv and useful Improvements in the Construction of Sheet-Metal Doors, of which theI following is ia specification.

r.This invention relates to the construction of sheet metal doors and particularly to the manner of' assembling the same and joining the stile sections to the central or panel section.

The object of the invention is to simplify the method of making doors of sheetv metal and to cheapen the construction so that this typeof door will beI capable of more successfully competing with Woodendoors from a cost standpoint.'

Another object of the invention is 'to providea standard construction for doors of various sizes and to provide a construction that `Will lend itself to the pron'uction of doors of differing sizes Without the necessity of providing separate tools or measurements for each size of door desired to be made.

By practising this invention it is not necessary to specially ft. or mate the panel with the stile sections as is the case when doors are constructed by riveting the panel to or folding it with a` part of the stile sections.

Also by this invention a Very rigid structuie is attained which lendsitself to the application of a smooth,` even finishto all parts of the door, that is at all times the desirable object in sheet metal door construct-ions.

.The invention consists in the improved construction ofsheetmetal doors as hereinafter more particularly described and 'then specified in the claims.

ln the accompanying drawings Figure l is a front elevation of a metallic door constructed in accordance with this invention. Fig. 2 is an enlarged transverse section of the same and taken on the line 2-2 of Fig. l. Fig. 3 is a cross-'section through the blank from which the stile section is formed. Fig. l is a cross-section on -afurther enlarged scale and illustrates the joint between the stile and the panel. Fig. 5 is a detached side elevation of the Welding strip used to join the parts together. Fig. 6 is a crosssection through one side of. a door having double panels.

1 and 2 indicate the side stile sections of of Welding nibs or projections l0.

a door While 3 and t indicate thetopa'nd.

rarest-ea sept-.11, l.isi-i.

bottom end stiles respectively. *After the;`

door is assembled the stiles l; i., S l and 4:`A may be secured to each other along the meet-v ing edges 5 in any suitable manner as soldering, brazing, or other means as Well i known in the art.

The stile members or sections are each preferably formed in the -k saine manner from a 4blanklof sheetinetal preferably formed at each edg'efwith a t molding member 6 of 'anydesiredcon-- formation. The blank as shown in Fig. 3

is preferably formed by stampingin asuitable press and a flange 7 projecting from' each edge of the molding members' Vi'is also'l provided.

in the forin l The flanges 7 terininateina depending skirt or flange 8 for -thejpurpose tively heavy` metal is placedfin the corner formed by the junction of the\flanges Tand and Welded to` the flange 7. Thestripft) which isof the same thickness -vas the depth-rvl4 of the flange 8 is provided along each edgev of the stile member. The preferable manner is by electrically Welding` itfthereto and to assist' of securing the strip 9 tnthe flange in such Welding operiitibntlie strip-9 is provided on its upper surface with a plurality As Will be'readily understood by thoselskilled inthe electric welding art, the nibs -or projections l0 arefplaced in Contact With the flange 7,

suitable current carrying electrodes. Upon .the strip and flange being held between a e the passage of an electric current: fronron'evlfelectrode tothe other the nibs lO coa-lesceV and on the application o-f pressure', prefer ably through the electrodes, the. nibs are forced imo the metal of the flange 7 and form a. number of separated spot Welds therewith. By providing the turned-over edge or flange 8 any buckling or rough edge on the flange 7 is avoided, as Whenattempting to Weld the surface of the flange, if it had a free edge, the softening of the metal and the applied pressure will cause a buckling of the flange and a rough edge Will result. This feat-ure is not broadly claimed herein but is made the subject of claims in another application'for patent filed by me herewith. The flange S also serves to coriceal the Welding strip 9 iin' the finished product. The Welding strip 9 is also pro- .vided on its under surface With a plurality rios ol nibs or projections ll preferably arranged in staggered relation to the nibs l0 so as to permit a llat contact for the welding electrode when employed to weld the nibs l0 to the llange T. Alfter welding the strips 9, the blank is bent or folded at the points 1Q to bring the two faces of the stile section parallel and form the edge i3 ot the stile member. ,e

il indicates the panel section which, owing to the manner of joining the parts together, may be of indefinite size and may comprise either a single thickness of metal as indicated in l? 2 and l or a double thickness spaced apart as indicated in Fig. 'o". rlhe welding nibs il ot the strip 9 along each inner edge et 'he stile section are brought into contact with the surface ot' the panel le opposite each other and at any desired part of the surface of said panel ac cording to the size panel or door desired. After being brought into contact the parts are engaged by suitable welding electrodes and current passed from one to the other and the nibs 1l welded to the panel 6 by the application. of pressure as will be readily understood by those skilled in the art. The panel lll and the stile are thus lirmly secured together and a smooth surface for the application ot' the linish is provided. The free ends l5 of the panel let project to a greater or less extent into the space Within the stile sections and by this construction it is not necessary to accurately measure or fit the panel to the stile, thus providing a uniform or standard size stile which can be employed t'or all sizes of doors within a proper radins.

Referring to Fig. G, when two panel mem bers are employed they are preferably spaced apart as by blocks 1G and the space may be filled with any sound-deadening ma terial desired as is usual in this art.

rlhe molding members G and lianges 7 may be suitably mitered' in the corners as at 1T and soldered, brazed or joined in any desired manner.

That I claim as my invention is l. In a sheet metal door, a panel, a stile 2. In a sheet metal door, a panel, a. stile section provided with a molding along the inner edge, aflange projecting inwardly from said molding and a relatively heavy solid metal strip betweei'i said flange and said panel, said strip being welded to the face of the panel and to the liange.

3. ln a sheet metal door, sheet metal stile sections provided with inwardly projecting moldings, a panel having free edges extending into the space within the said stile sections and a strip of relatively heavy metal welded to both the molding and the panel to join the stile to the panel.

el. In a sheet metal door, a panel section, a stile section haring inwardly projecting flanges o'n opposite sides of s; id panel and a metallic strip on each side of said panel between said ilange and the surface of the panel7 said strips being welded to said flanges and the panel.

ln a sheet metal ,.laor, a panel section hai-'ing free' edges, a o ie-piece stile section having an integral molding on opposite sides of the panel. a flange projecting from aid molding and a welding strip between said liange and the snrt'ace et the panel, said strip being welded to both the liange and the panel.

(5. ln a sheet metal door, a panel section, a stile section having an inwardly projecting flange and a metallic strip between said flange and the surface of said panel and welded to said flange and said panel, the edge or" said llange being turned over against the side of said strip Signed at N ew York in the county of New York and State of Newhvorl: this 5th day of May A. D. 1913.

MAURICE LACHMN.

lllitnesses F. B. TowxsnND, K. M. liloMaHoN. 

